Oven not working again!!

My oven stopped working again! This has happened more than once already. Tried calling the call centre last week, held on and then just got cut off - twice. Went onto the Facebook page and saw an email [Email Removed] Sent an email and received a response saying that it has been escalated with a reference number 7 days later. Called today and was asked did he still not contact you? Was told that he will be able to help me and a note was left to return my call. I requested his email address and sent an email. Obviously, I got no call back or response to my email. When will this be resolved? My warranty is almost finished and my oven is bound to break again!